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The C63 AMG has the P31 package which provides the 6.2 liter M156 V8 with stronger forged internals and a more aggressive tune. It is about equal to a C63 AMG with a tune on it so power should be somewhere in the low 420 WHP range. So the M5 has more power, but also a few hundred more pounds to carry.

The C63 belongs to BenzBoost member @xtyper and he claims it is stock. The M5 is also stock. Hard to understand why the M5 does not pull away up top with all that horsepower.

I'm not surprised with the results considering the weight of that m5. Depending on how many runs both cars had before this, the M5 would be more prone to heatsoak in that kind of weather. But a win is a win, so congrats to the p31 c63.

I'm not surprised with the results considering the weight of that m5. Depending on how many runs both cars had before this, the M5 would be more prone to heatsoak in that kind of weather. But a win is a win, so congrats to the p31 c63.

Believe me, both the M5 owner and myself were very surprised by the outcome. So much so, that we must have raced 5 times before the day was over. Every time, same result, almost dead even all the way to the finish line. The M5 owner was really cool, and I'm sure once he gets tuned it will be a very different story. Should note that I also raced another gray F10 M5 at the event with exhaust (another very cool guy), and although he beat me by about 2 cars, it was only because he jumped me at the start. By the end of the race I had stopped the pull. Had the start been even, it would have been a VERY close race, likely very similar to what you see here against the white M5.

If any other F10 M5's want a piece of me, I'll be at the next airstrip event in April with longtubes and a tune.

well i mean the M5 is alot heavier than the C63....remember the c63 vs the V and how the c63 beat it by a hair?....weight is the only thing i can see contributing to it....still doesnt make sense....i mean...im pulling at hairs here trying to see it....lol

Believe me, both the M5 owner and myself were very surprised by the outcome. So much so, that we must have raced 5 times before the day was over. Every time, same result, almost dead even all the way to the finish line. The M5 owner was really cool, and I'm sure once he gets tuned it will be a very different story. Should note that I also raced another gray F10 M5 at the event with exhaust (another very cool guy), and although he beat me by about 2 cars, it was only because he jumped me at the start. By the end of the race I had stopped the pull. Had the start been even, it would have been a VERY close race, likely very similar to what you see here against the white M5.

If any other F10 M5's want a piece of me, I'll be at the next airstrip event in April with longtubes and a tune.

Hey there buddy. I sent you a PM so we can hook up off the race track. I know whatever Benz you drive, it will be a monster. Your e63 sure was. What engine option or tune did you have that gave you the 510hp? The guys on the BMW forum don't get what I'm talking about. I know you said it was the Black Series motor. Did you buy the car that way or was that done at the dealer?

Wasn't Jon on this forum with the C63 and OE tune, dead even with a stock F10 too? Im starting to think all of these magic F10 M5's are tuned on the low. I always wondered how a 120mph trap car (M5) was walking hard, in the high teens mph trap cars.

Hey there buddy. I sent you a PM so we can hook up off the race track. I know whatever Benz you drive, it will be a monster. Your e63 sure was. What engine option or tune did you have that gave you the 510hp? The guys on the BMW forum don't get what I'm talking about. I know you said it was the Black Series motor. Did you buy the car that way or was that done at the dealer?

Hey there buddy. I sent you a PM so we can hook up off the race track. I know whatever Benz you drive, it will be a monster. Your e63 sure was. What engine option or tune did you have that gave you the 510hp? The guys on the BMW forum don't get what I'm talking about. I know you said it was the Black Series motor. Did you buy the car that way or was that done at the dealer?

Look forward to our next race.

Arnie

Hey Arnie, nice to see you on here!

I think there was some confusion when we talked about my car at the event. While my car with the P31 package supposedly has the same engine as the Black Series (M156 w/ forged internals), it does not come with the same stock hp rating (481hp for my car vs 510hp for the Black). Most assume this is attributable to a more aggressive factory tune put on the Black Series. However, most dyno runs of the P31 show it is underrated and actually making closer to the 510 crank horsepower that the Black Series is rated at. That's not to suggest it's really making the same power as the Black Series, because my suspicion is that the Black Series is a bit underrated itself.

BS expert guys, feel free to correct anything I mispoke about.

Hope that helps to clarify things a bit. And yes, we definitely need to hook up off the race track!

I hear what you're trying to say. It's not a black series motor since they are all M156 motors. It might have a similar tune and hp as a Black Series....but there are also other M156's like the SL, CL and S class that got an even hotter tune pushing those to 525hp IIRC. IMO the P31 pkg was just another marketing technique by Mercedes. Sure it's got forged internals, but that really doesn't mean much. Or were they trying to say that the bottom end needs to be upgraded for the extra hp from the tune ? Probably not considering there are many people putting far more power than that on non forged M156's. Either way, you have a quick car no doubt...and with long tubes and a tune it will totally change the car.